强采动影响下碎裂煤柱合理留设及支护技术研究

Research on Reasonable Retaining and Supporting Technology of Fragmented Coal Pillar under Strong Mining Influence

为了探究强采动影响下沿空巷道合理煤柱宽度的留设问题,综合采用极限平衡理论、FLAC数值模拟和工程实践的方法对煤柱宽度及支护设计的适应性进行了详细阐述。综合分析得出合理煤柱宽度为15 m,并依据围岩的应力和破碎的非对称特性,建立高强预应力锚杆索耦合作用下的非对称支护技术,并在试验段得以工程检验。

In order to explore the problem of rational pillar width in gob side entry under the influence of strong mining. The limit equilibrium theory, FLAC numerical simulation and engineering practice are adopted to explain the adaptability of coal pillar width and support design. It is concluded that the rational coal pillar width is 15 m, and according to the asymmetric characteristics of stress and breakage of the surrounding rock, the asymmetric support technology of the high strength prestressed anchor cable coupling is established, and the test section can be tested in the test section.